PSI - Issue 57

Nesrine Majed et al. / Procedia Structural Integrity 57 (2024) 502–509 Nesrine Majed et al. / Structural Integrity Procedia 00 (2019) 000 – 000 For the load ratio =0.1 , a numerical simulation is conducted to another sample with a spherical defect (size = √ = 700 µm), and it is subjected to its experimental defective limit equal to 100 MPa as indicated by Mu et al (2014). Therefore, the affected depth value is = 120 μm. The results are illustrated in Figure 6. 507 6

a

b

5.2. Fatigue limit assessment for a defective material based on AD approach The affected depth approach is used to compute HCF life of the defective A357-T6 alloy. In this section, Kitagawa diagrams have been populated with the results for load ratios = -1 and 0.1, respectively. The Kitagawa diagram is based on an iterative calculation. For any defect size, the fatigue limit is determined by changing the load amplitude Fig. 6. Identification of parameter (a) tension loading, = -1; (b) tension loading, = 0.1.